perf newt: Make <- exit the ui_browser

Right now that means that pressing the left arrow willl make the symbol
annotation window to exit back to the main symbol histogram browser.

This is another improvement on the UI fastpath, i.e. just the arrows and
enter are enough for most browsing.

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index e74df12..5ded2f0 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -323,6 +323,7 @@
 	newtFormAddHotKey(self->form, NEWT_KEY_PGDN);
 	newtFormAddHotKey(self->form, NEWT_KEY_HOME);
 	newtFormAddHotKey(self->form, NEWT_KEY_END);
+	newtFormAddHotKey(self->form, NEWT_KEY_LEFT);
 
 	if (ui_browser__refresh_entries(self) < 0)
 		return -1;
@@ -408,6 +409,7 @@
 		}
 			break;
 		case NEWT_KEY_ESCAPE:
+		case NEWT_KEY_LEFT:
 		case CTRL('c'):
 		case 'Q':
 		case 'q':
@@ -616,7 +618,7 @@
 	if (hist_entry__annotate(self, &head) < 0)
 		return;
 
-	ui_helpline__push("Press ESC to exit");
+	ui_helpline__push("Press <- or ESC to exit");
 
 	memset(&browser, 0, sizeof(browser));
 	browser.entries = &head;